JP6979415B2 - Forging press and how to replace its mold - Google Patents

Description

The present invention relates to a forging press and a method for exchanging a die thereof.

Conventionally, there has been known a forging press in which a metal material provided between an upper die provided in the upper die holder at the lower end of the slide is moved up and down and a metal material provided between the lower die of the lower die holder is sandwiched and pressed. In such a forging press, the upper die holder and the lower die holder are connected by a stretchable guide post (for example, Patent Document 1).

Then, when exchanging the upper die and the lower die, for example, as in Patent Documents 2 and 3, the die holder is taken out from the press machine and exchanged.

Utility Model Registration No. 2571841 Japanese Unexamined Patent Publication No. 8-10875 Japanese Patent No. 4755035

However, in order to remove the upper die holder from the slide, the operator sandwiches the support block between the upper die holder and the lower die holder, and then removes the support block.

For this reason, the operator had to approach the bottom of the slide and attach it with the forging press stopped.

The present invention has been made in view of this point, and an object of the present invention is to stop the forging press at the time of die replacement so that the operator does not approach the vicinity of the slide and place the support block. The purpose is to enable safe and quick mold replacement.

In order to achieve the above object, in the present invention, the support block that supports the upper die holder can be taken in and out by the support block drive unit.

Specifically, the forging press of the first invention is
A press body that has a base plate and moves the slide up and down above the base plate,
An upper die holder that is detachably attached to the lower end of the slide and holds the upper mold,
A lower die holder that is detachably mounted on the above base plate and holds the lower mold,
A cylinder-shaped guide post that flexibly connects the upper die holder and the lower die holder,
At least a retractable support block that supports the upper die holder removed from the slide,
A support block drive unit that moves the support block between a support position that supports the upper die holder and a retracted position that retracts from below the upper die holder.
It is provided with a die holder transfer unit for carrying in and out the upper die holder and the lower die holder in a state of being supported by the support block.

According to the above configuration, the support block can be moved by the support block drive unit to support the upper die holder, so that the operator does not have to approach the bottom of the slide to attach it, and the mold replacement work can be performed safely and quickly. Can be done.

In the second invention, in the first invention,
The support block has an upper end surface that supports the lower end of the outer tube of the guide post.

According to the above configuration, the guide post can be used to reliably support the upper die holder.

In the third invention, in the first or second invention,
The support block drive unit
A horizontal base provided on the side of the lower die holder to support the support block so as to be slidable, and
A support block cylinder that is provided on the horizontal table and slides to move the support block by expanding and contracting.
It is provided with a lock mechanism for detachably connecting the support block cylinder and the support block.

According to the above configuration, the support block can be reliably moved with a simple configuration.

In the fourth invention, in the third invention,
The lock mechanism is provided at the tip of a connecting member that is slid and moved by the support block cylinder, and is provided with a hook that can be engaged with and detached from the support block.
The hook is configured to be able to lock the locked portion provided on the support block.

According to the above configuration, since the locked portion of the support block can be locked by the hook of the lock mechanism, the support block can be engaged with and disengaged from the connecting member without relying on human hands. ..

In the fifth invention,
Stop the press operation of the press body,
The support block drive unit moves the support block from the retracted position to the support position that supports the upper die holder that holds the upper mold.
The slide provided on the press body so as to be able to move up and down is lowered, and the upper die holder is placed on the support block.
Disengage the above upper die holder and the above slide,
The upper die holder removed from the slide is retracted together with the lower die holder that holds the lower mold.
Replace the upper mold and the lower mold,
The upper die holder and the lower die holder with the upper die and the lower die replaced are returned to the lower part of the slide with the upper die holder supported by the support block.
Re-engage the upper die holder and the slide,
Raise the slide with the upper die holder and raise it.
The support block is retracted to the retracted position by the support block drive unit, and the support block is retracted to the retracted position.
The press operation of the press body is restarted.

According to the above configuration, the support block can be moved by the support block drive unit to support the upper die holder, so that the operator does not have to approach the lower part of the slide and attach it, and the mold replacement work can be performed safely and quickly. Can be done.

As described above, according to the present invention, the support block is moved by the support block drive unit to support the upper die holder, so that the operator approaches the vicinity of the slide and supports the support block when the mold is replaced. Molds can be replaced safely and quickly without mounting.

It is a front view which enlarged and shows a part of the forging press in the state which supported the upper die holder by the support block which concerns on embodiment of this invention. FIG. 3 is an enlarged front view showing a part of a forging press in a state before the upper die holder is supported by a support block at a support position according to an embodiment of the present invention. It is a front view which shows the part of the forging press in the state which one support block is in a support position, and the other support block is in a retracted position which concerns on embodiment of this invention. FIG. 3 is a plan view showing a part of a forging press in a state where one support block is in a support position and the other support block is in a retracted position according to an embodiment of the present invention. It is an enlarged arrow view seen from the IV direction of FIG. 1A. It is an enlarged plan view which shows the state which moved the support block which was in a standby state to a support position. It is an enlarged plan view which shows the state in which the support block which was in a standby state is brought into contact with a stopper. It is an enlarged plan view which shows the unlocked state in the support position of the support block which was in a standby state. It is a flowchart which shows the exchange method of the die of a forging press.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

-Structure of forging press-
2 and 3 show a forging press according to an embodiment of the present invention, and the forging press includes, for example, a press body 1 made of a mechanical hot forging press, and the basic structure thereof is not particularly limited. .. The press main body 1 is provided so that the slide 3 to which the upper die (not shown) is attached and the base plate 2 face each other vertically in the frame 1a. Further, the slide 3 is configured to move up and down above the base plate 2 by a driving means (not shown). The forging press is entirely controlled by a controller 50 including a CPU, an input device, and the like.

An upper die holder 5 for holding an upper mold (not shown) is detachably attached to the lower end of the slide 3. Although not shown in detail, the upper die holder 5 is detachably connected to the slide 3 by a cylinder-shaped upper die clamper 8.

A lower die holder 4 for holding a lower mold (not shown) is detachably mounted on the base plate 2. Although not shown in detail, the lower die holder 4 is removable in a state of being lifted by a die lifter 7 that can be raised and lowered up and down.

As shown in an enlarged manner in FIG. 1A, the upper die holder 5 and the lower die holder 4 are stretchably connected to each other by, for example, a pair of cylinder-shaped guide posts 6. The guide post 6 has a rod 6a connected to the lower die holder 4 and a cylindrical outer tube that wraps the outer circumference of the rod 6a and is connected to the upper die holder 5 so as not to interfere with the pressing operation of the press body 1. It is equipped with 6b.

Further, in the present embodiment, at least the upper die support block 10 that can move forward and backward to support the upper die holder 5 removed from the slide 3 is provided. The upper die support block 10 has a support position A (shown on the left side of FIGS. 2 and 3) for supporting the upper die holder 5 by the support block drive unit 20 and a retracted position B (retracted from below the upper die holder 5). It is configured to be movable between (shown on the right side of FIGS. 2 and 3). The support block drive unit 20 is controlled by the controller 50 according to a program specified in advance or by direct operation. As also shown in FIG. 5A, the upper support block 10 has a substantially horseshoe shape having an arcuate upper end surface 11 in a plan view supporting the annular lower end of the outer tube 6b of the guide post 6. The upper die support block 10 has a pair of flat plates 12a extending horizontally on the opposite side of the opening and a protruding portion 12 having a locked portion 12b made of a bolt or the like that connects the pair of flat plates 12a up and down.

As shown in FIG. 4, the support block drive unit 20 is provided on the side of the lower die holder 4, and is provided on the horizontal base 21 that supports the upper die support block 10 so as to be slidable, and on the lower side of the horizontal base 21. It is provided with a support block cylinder 22 that slides and moves the upper mold support block 10 by expanding and contracting. The shape of the horizontal base 21 is not particularly limited, but at least the upper support block 10 has a flat surface that can be horizontally moved. For example, the pair of support block cylinders 22 are arranged so that the rods 22a extend in a direction away from each other, and the connecting member 23 is connected to the tip of each rod 22a. As shown in FIG. 4, the support block cylinder 22 is provided below the horizontal table 21 at a position hidden behind the horizontal table 21 in a plan view. Therefore, the support block cylinder 22 is less likely to be damaged by a falling object or the like. The connecting member 23 has, for example, a rod-shaped rod extension portion 23a connected to the rod 22a, a hook connecting portion 23b arranged in parallel above the horizontal base 21, and these rod extension portions 23a and the hook connecting portion 23b up and down. It is provided with a connecting upper and lower connecting portion 23c. The shape of the connecting member 23 is not particularly limited.

Then, the support block cylinder 22 and the upper mold support block 10 are detachably connected by the lock mechanism 30 via the connecting member 23. As shown enlarged in FIG. 5A, the lock mechanism 30 is provided at the tip of the hook connecting portion 23b which is slid and moved by the support block cylinder 22, and is hook-shaped hook 31 which can be engaged with and detached from the upper support block 10. It is equipped with. The lock mechanism 30 also includes a lock cylinder 32 provided on the upper end surface 11 of the hook connecting portion 23b. The rod of the lock cylinder 32 extends to the side opposite to the rod 22a of the support block cylinder 22, and a lock portion 32a is provided at the tip thereof. The lock portion 32a is configured to be able to lock the upper mold support block 10 by pressing, for example, a pair of pin-shaped (bolt-shaped) locked portions 12a provided on the upper mold support block 10 against the hook 31.

Although not shown in detail, a die holder transfer unit having, for example, a known configuration is provided for carrying out and carrying in the upper die holder 5 and the lower die holder 4 in a state of being supported by the upper die support block 10.

-How to replace the mold-
Next, a method of replacing the die in the forging press according to the present embodiment will be described with reference to FIG. The following dimensions are just an example.

First, in step S01, the worker manually operates the controller 50 to stop the pressing operation of the pressing body 1.

Then, the controller 50 performs the following operation according to the procedure programmed in advance.

In step S02, the support block drive unit 20 moves the upper die support block 10 from the retracted position B shown in FIGS. 1A and 5A to the support position A that supports the upper die holder 5 that holds the upper mold. Specifically, first, in step S21, the upper die support block 10 and the hook 31 are fixed by the lock cylinder 32.

Then, in step S22, the support block cylinder 22 is reduced, and the hook 31 is pushed in by about 200 mm.

Then, in step S23, as shown in FIG. 5B, the upper die support block 10 advances 195 mm and hits the stopper 33 to stop.

Then, in step S24, as shown in FIG. 5C, the hook 31 advances further 5 mm, but the lock cylinder 32 contracts 5 mm. Therefore, the upper die support block 10 does not advance further and is located at a position of 195 mm.

Then, in step S25, a gap c of 5 mm is secured on each side in the slide direction between the upper die support block 10 and the hook 31. As described above, in the present embodiment, the upper mold support block 10 can be reliably moved with a simple configuration.

Then, in step S03, the lock cylinder 32 is released. Specifically, in step S31, the lock cylinder contracts by 15 mm, and the hook 31 is unlocked by the lock portion 32a. As a result, the upper die holder 5 and the lower die holder 4 can be carried out together with the upper die support block 10. In the present embodiment, the lock mechanism 30 can be used to engage and disengage the upper mold support block 10 with the connecting member 23 without relying on human hands.

Next, in step S04, the slide 3 is lowered from the state shown in FIG. 1B, and the upper die holder 5 is placed on the upper die support block 10 as shown in FIG. 1A. At this time, the lower end of the outer tube 6b of the guide post 6 is supported by the upper end surface 11 of the upper die support block 10 having a horseshoe shape in a plan view. As described above, in the present embodiment, the upper die holder 5 can be reliably supported by using the guide post 6. Then, in step S041, the upper die clamper 8 is opened to release the engagement between the upper die holder 5 and the slide 3.

Next, in step S05, the upper die holder 5 removed from the slide 3 is lifted by the die lifter 7 together with the lower die holder 4 holding the lower mold, and is carried out by the die holder transfer unit so as to be retracted.

Next, in step S06, the worker replaces the upper mold and the lower mold. For example, the carried-out upper die holder 5 is removed by a crane or the like, the upper die and the lower die are replaced, and the upper die holder 5 is returned to the state of being placed on the original upper die support block 10.

Next, in step S07, the upper die holder 5 and the lower die holder 4 in the state where the upper die and the lower die are exchanged are returned to the lower side of the slide 3. While the mold replacement work is being performed, the upper die holder 5 and the lower die holder 4 in which another upper mold and lower mold are set in advance may be carried in.

Then, in step S071, the upper die clamper 8 is tightened to re-engage the upper die holder 5 and the slide 3.

Then, in step S08, the slide 3 is raised together with the upper die holder 5.

Next, in step S09, the lock cylinder 32 is set. Specifically, the lock cylinder 32 is operated, and the upper die support block 10 is movably locked by the hook 31.

Next, in step S10, the upper die support block 10 is retracted to the retracted position B by the support block driving unit 20. Specifically, the support block cylinder 22 is extended to slide the upper support block 10 on the horizontal table 21.

Next, in step S11, after confirming that the worker can work, the controller 50 is operated to restart the pressing operation of the pressing body 1.

As described above, in the present embodiment, since the upper die support block 10 can be moved by the support block drive unit 20 to support the upper die holder 5, it is necessary for an operator to approach and attach the upper die support block 10 directly under the slide 3. There is no.

As described above, according to the present invention, the mold can be replaced safely and quickly without the operator approaching the vicinity of the slide 3 and mounting the upper mold support block 10 at the time of mold replacement.

(Other embodiments)
The present invention may have the following configurations with respect to embodiments.

That is, in the above embodiment, the upper die support block 10 is configured to support the lower end of the outer tube 6b of the guide post 6, but is not limited to this, and is configured to be able to support any part of the upper die holder 5. It suffices if it has been done.

It should be noted that the above embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its applications and uses.

1 Press body
1a frame
2 Base plate
3 slides
4 Lower die holder
5 Upper die holder
6 Guide post
6a rod
6b outer tube
7 Die lifter
8 Upper die clamper
10 Upper mold support block
11 Top surface
12 Protruding part
12a flat plate
12b Locked part
20 Support block drive unit
21 Horizontal stand
22 Cylinder for support block
22a rod
23 Connecting member
23a Rod extension
23b Hook connection
23c Vertical connection part
30 lock mechanism
31 hook
32 lock cylinder
32a lock part
33 Stopper
50 controller

Claims (5)

A press body that has a base plate and moves the slide up and down above the base plate,
An upper die holder that is detachably attached to the lower end of the slide and holds the upper mold,
A lower die holder that is detachably mounted on the above base plate and holds the lower mold,
A cylinder-shaped guide post that flexibly connects the upper die holder and the lower die holder,
At least a retractable support block that supports the upper die holder removed from the slide,
A support block drive unit that moves the support block between a support position that supports the upper die holder and a retracted position that retracts from below the upper die holder.
A forging press comprising a die holder transfer unit for carrying out and carrying in the upper die holder and the lower die holder in a state of being supported by the support block. In the forging press according to claim 1,
The support block is a forged press characterized by having an upper end surface that supports the lower end of the outer tube of the guide post. In the forging press according to claim 1 or 2.
The support block drive unit
A horizontal base provided on the side of the lower die holder to support the support block so as to be slidable, and
A support block cylinder that is provided on the horizontal table and slides to move the support block by expanding and contracting.
A forged press characterized by having a lock mechanism for detachably connecting the support block cylinder and the support block. In the forging press according to claim 3,
The lock mechanism is provided at the tip of a connecting member that is slid and moved by the support block cylinder, and is provided with a hook that can be engaged with and detached from the support block.
A forged press characterized in that the hook is configured to be able to lock a locked portion provided on the support block. Stop the press operation of the press body,
The support block drive unit moves the support block from the retracted position to the support position that supports the upper die holder that holds the upper mold.
The slide provided on the press body so as to be able to move up and down is lowered, and the upper die holder is placed on the support block.
Disengage the above upper die holder and the above slide,
The upper die holder removed from the slide is retracted together with the lower die holder that holds the lower mold.
Replace the upper mold and the lower mold,
The upper die holder and the lower die holder with the upper die and the lower die replaced are returned to the lower part of the slide with the upper die holder supported by the support block.
Re-engage the upper die holder and the slide,
Raise the slide with the upper die holder and raise it.
The support block is retracted to the retracted position by the support block drive unit, and the support block is retracted to the retracted position.
A method for replacing a forging press die, which comprises restarting the press operation of the press body.

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